项目
item

指标index

GL-65

GL-55

GL-48

AL2O3,%≥

65

55

48

Fe2o3,%≤

2.0

耐火度,℃≥
Refractoriness

1790

1770

1750

0.2MPa荷重软化开始温度，℃≥
Temp of soft Begin Under
0.2MPa Load

1500

1480

1450

重烧线变化,%
The Chang of Reheat
Linear

1500℃,2h

0
-0.2

1450℃,2h

0
-0.2

显气孔率,%≤
Apparent Porosity

19

18

常温耐压强度,MPa≥
Normal Temp Crushing Strength

58.8

49.0

透气度
Permeability of Air